Tourist bus to Jinshanling in June

Hello! Me and my sister are going to Beijing somewhere in June 2014. Will the tourist bus from Dongzhimen Long-distance Bus Station go all the way to the wall? Or do we have to change the bus somewhere / take a taxi? Also, is there a special tourist bus for other sections as well (as far as I understood, to the other sections we would have to take a public bus and change at least once every time, which wouldn't really work for us)?